Tag: Paper
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Synchronization and Coexistence in Quantum Networks
Abstract We investigate the coexistence of clock synchronization protocols with quantum signals in a common single-mode optical fiber. By measuring optical noise between 1500 nm to 1620 nm we demonstrate a potential for up to 100 quantum, 100 GHz wide channels coexisting with the classical synchronization signals. Both “White Rabbit” and pulsed laser-based synchronization protocols were
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10 Gigabit White Rabbit: Sub-Nanosecond Timing and Data Distribution
Abstract Time synchronization is a critical feature for many scientific facilities and industrial infrastructures. The required performance is progressively increasing everyday, for instance, few tens of nanoseconds for Fifth Generation (5G) networks or sub-nanosecond accuracy on next family of particle accelerators and astrophysics telescopes. Due to this exigent accuracy, many applications require specific timing dedicated
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White Rabbit Applications and Enhancements
Abstract This article provides a non-exhaustive overview of applications and enhancements to the White Rabbit (WR) extension of the IEEE 1588 Precision Time Protocol (PTP). Initially developed to serve accelerators at the European Or-ganization for Nuclear Research (CERN), WR has become a widely-used synchronization solution in scientific installations. This article classifies WR applications into five
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White Rabbit Absolute Calibration
Abstract White Rabbit (WR) is a widely used implementation to create high accuracy time dissemination networks. Onsite network calibration can be avoided when using absolute calibrated components, which can be freely exchanged withoutrecalibration. Absolute calibration of high accuracy time dissemination network components enables independent developers and/or vendors to exchange their calibrated components while achieving absolute
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White Rabbit-Based Time Distribution at NIST
Abstract The National Institute of Standards and Technology (NIST) produces a real-time realization of UTC(NIST) which is used to contribute to Coordinated Universal Time (UTC) and as a source for accurate time in the USA. The atomic clocks contributing to the time scale ensemble, the time transfer systems used to contribute to UTC and the
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White-Rabbit-enabled Data Acquisition System
Abstract This work examines the feasibility of using Ethernet-based time transfer methods based on White Rabbit technology to discipline all the clock domains of a networked data acquisition system (DAQ). Existing systems provide synchronization capabilities, albeit the performance achieved is often not accurate enough for scientific infrastructures and Smart Grid applications requiring frequency coherent and
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Using single wavelength light to improve the synchronization accuracy of the White Rabbit system
Abstract We demonstrate a new synchronization method for the White Rabbit system. Signals are transmitted in a single mode fiber in both directions with the same light wavelength. Without the complex calibration process of the fiber asymmetry parameter, the new method reduces the effect of chromatic dispersion and improves the synchronization accuracy. The experiment achieves
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Scalability Analysis of the White-Rabbit Technology for Cascade-Chain Networks
Abstract Due to an increase of timing requirements in many actual and future applications, improvements are needed in current synchronization protocols. New scenarios as the Internet of Things or the next generation of 5G Mobile telecommunication networks, where a large number of devices must be interconnected, will stand in need of a better synchronization accuracy
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White Rabbit Precision Time Protocol on Long-Distance Fiber Links
Abstract The application of White Rabbit precision time protocol (WR-PTP) in long-distance optical fiber links has been investigated. WR-PTP is an implementation of PTP in synchronous Ethernet optical fiber networks, originally intended for synchronization of equipment within a range of 10 km. This paper discusses the results and limitations of two implementations of WR-PTP in
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Temperature Effect on White Rabbit Timing Link
Abstract White Rabbit (WR) technology combines gigabit Ethernet data transfer with synchronization at subnanosecond accuracy and picoseconds precision over the same fiber medium. In some applications, the WR link must maintain the synchronization accuracy over a wide temperature range. The temperature effect on a WR link is measured, and contributions from different components like optical